What is global warning? Our world faces an everlasting dangerous threat…… global warming. This is caused by the increase of the earth’s atmosphere temperature and by the moving levels of carbon dioxide. We know this because in the last 650,000 years the polar ice caps have gradually been reduced to water. The Polar ice caps melting. Other things have also been caused by this problem such as the ocean rising, heat rising, droughts, floods, storms and many more that will occur in the following…